Locale: add format

src/locale/format.js

@@ -0,0 +1,47 @@
+/**
+ *  String format template
+ *  - Inspired:
+ *    https://github.com/Matt-Esch/string-template/index.js
+ */
+
+const RE_NARGS = /(%|)\{([0-9a-zA-Z_]+)\}/g;
+
+export default function(Vue) {
+  const { hasOwn } = Vue.util;
+
+  /**
+   * template
+   *
+   * @param {String} string
+   * @param {Array} ...args
+   * @return {String}
+   */
+
+  function template(string, ...args) {
+    if (args.length === 1 && typeof args[0] === 'object') {
+      args = args[0];
+    }
+
+    if (!args || !args.hasOwnProperty) {
+      args = {};
+    }
+
+    return string.replace(RE_NARGS, (match, prefix, i, index) => {
+      let result;
+
+      if (string[index - 1] === '{' &&
+        string[index + match.length] === '}') {
+        return i;
+      } else {
+        result = hasOwn(args, i) ? args[i] : null;
+        if (result === null || result === undefined) {
+          return '';
+        }
+
+        return result;
+      }
+    });
+  }
+
+  return template;
+}

src/locale/index.js

@@ -1,5 +1,8 @@
 import defaultLang from 'element-ui/src/locale/lang/zh-cn';
 import Vue from 'vue';
+import Format from './format';
+
+const format = Format(Vue);
 let lang = defaultLang;
 
 export const $t = function(path, options) {
@@ -13,7 +16,7 @@ export const $t = function(path, options) {
   for (var i = 0, j = array.length; i < j; i++) {
     var property = array[i];
     var value = current[property];
-    if (i === j - 1) return value;
+    if (i === j - 1) return format(value, options);
     if (!value) return '';
     current = value;
   }